I've got the esky controller. It comes with FMS, which is free for everyone. Which is availabe here http://n.ethz.ch/student/mmoeller/fms/index_e.html. To me it seems to be built out of solid plastic; I imagine it is the same as an esky Tx, just mostly empty. It seems to work quite well for most other programs I have used it for, but all the controls are backwards, so you have to be able to invert the controls to make them work. The only thing I haven't been able to do this completely with is MS Simulator 2004. The rudder is the only thing that wont reverse. I don't really know what you are asking, so I am just kind of rambling. If there is something more specific you would like to know, just ask =)